import * as crc from 'crc';

interface ServerInfo {
    id: string;
    serverType: string;
    host: string;
    port: number;
    clientHost?: string;
    clientPort?: number;
    frontend ?: boolean;

    args ?: string | string[];
    cpu ?: number;

}

export async function dispatch(redis: any, uid: string, connectors: ServerInfo[], serverType: string = '') {
    connectors.sort((a, b) => a.id > b.id? 1: -1);

    if (serverType) {
        let appid: string = await redis.hgetAsync('roleRoute', `${uid}_${serverType}`);
        if(!appid) {
            let index = Math.abs(crc.crc32(uid)) % connectors.length;
            let connector = connectors[index];
            appid = connector.id;
            redis.hsetAsync('roleRoute', `${uid}_${serverType}`, appid);
        }
        let roleRoute = connectors.find(obj => obj.id == appid);
        return roleRoute;
    }
    let index = Math.abs(crc.crc32(uid)) % connectors.length;
    return connectors[index];
}